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Earthing refers to the practice of connecting the electrical panels / devices to the earth system for electrical safety .
Grounding term is used in sense of ground fault occurences in electrical circuits .
The connection we delibratetly makes with earth for protection and reference is grounding..
The connection occures with earth accidently or due to any fault is earthing.. :)
Ground is a source for unwanted currents and also as a return path for main current. While earthing is done not for return path but only for protection of delicate equipments. It is an alternate low resistance path for current. Earth is used for the safety of the human body in fault conditions while Grounding (As neutral earth) is used for the protection of equipments.